If I had to guess, I would say Lab Corp is going to lay off pretty much everybody...with the exception of the C-Suite people. CEO's, COO's etc. always include either a retention package or golden parachute in the deal for themselves. HOWEVER, everybody else better start getting their resumes out and QUICK because I predict the lay offs will be massive; at least 40%, potentially 90%+. After all, Lab Corp did not buy Sequenom for the people--they have their own people. They bought Sequenom for their product(s)--which they will now roll into their own product line--they don't need Sequenom's people.
I've seen this happen before: company A buys company B, moves the C-level people (and a few key players) to the new company location, lays off everybody who's left, sells all the assets, then finally sells the building. The company is gutted like a fish.